CT and MRI imaging in patients with otosclerosis: pre-surgical evaluation, differential diagnosis and post-stapedectomy complications

Congress:

ECR 2019

Poster Number:

C-1660

Type:

Educational Exhibit

Keywords:

Ear / Nose / Throat, Head and neck, Neuroradiology brain, CT, CT-High Resolution, MR, Complications, Diagnostic procedure, Structured reporting, Demineralisation-Bone, Prostheses

Authors:

F. J. Barba Tamargo¹, N. Perez Iglesias¹, L. calvo apraiz¹, J. Elejondos¹, A. Aguado¹, I. Goicoechea¹, M. Gredilla², M. LETURIA ETXEBERRIA³, A. Serdio⁴; ¹San Sebastian/ES, ²DONOSTIA/ES, ³San Sebastian, Gipuzkoa/ES, ⁴Donostia - San Sebastián/ES

DOI:

10.26044/ecr2019/C-1660

DOI-Link:

https://dx.doi.org/10.26044/ecr2019/C-1660

Fig. 2: Coronal reconstruction of the temporal bone where the normal anatomy is...

Fig. 3: Axial CT images showing osteolytic areas (arrows) in the fissula ante...

Fig. 4: Axial CT images showing osteolytic areas (arrows) in the fissula ante...

Fig. 5: Obliterative otosclerosis. A and B) Coronal CT images of the temporal bone...

Learning objectives

Review of the pathogenesis, clinical characteristics and typical findings in CT imaging of otosclerosis, andpost-stapedectomy complications. Remember the key features in the preoperative radiology evaluation.

Background

Otosclerosis is an otodystrophy of the otic capsule that is characterized by the replacement of the normal ivory-like enchondral bone by spongy vascular bone. In its evolution the disease will subsequently present abnormal bone deposits with sclerosis. Otosclerosis is more prevalent in women than in men (♀>♂ 2:1). Tipically, patients present during their 4th and 5th decades. Caucasians are more frequently affected than other racial group. The pathogenesis of otosclerosis is likely multifactorial and is not completely understood, with viral, inflammatory, genetic an autoimmune components....

Findings and procedure details

ROLE OF RADIOLOGY IN OTOSCLEROSIS The imaging tests are not routinely necessary and the diagnosis is confirmed at surgery. Imaging tests are useful in atypical cases to rule out other causes of hearing loss and also to rule out postoperative complications. It also allows us to identify factors of poor prognosis and anatomical alterations that hinder surgery and increase the risk of surgical complications, such as an obliterative otosclerosis or facial nerve canal dehiscence. High resolution CT of the temporal bone using 1-mm (or less)...

Conclusion

High resolution CT has become a very useful tool for the early identification of patients with suspected otosclerosis, excludes other causes of hearing loss and allows a correct preoperative evaluation that help us to determine the type of surgery and reduce postoperative complications

Personal information

References

O. Vicente Ade,H.K. Yamashita,P.L. Albernaz,N. Penido, O. de Computed tomography in the diagnosis of otosclerosis. Otolaryngol Head Neck Surg., 134 (2006), pp. 685-692 A.M. Quesnel,G. Moonis,J. Appel,J.T. O’Malley,M.J. McKenna,H.D. Curtin: Correlation of computed tomography with histopathology in otosclerosis. Otol Neurotol., 34 (2013), pp. 22-28. F. Veillon,J.L. Stierle,J. Dussaix,L. Ramos-Taboada,S. Riehm. Otosclerosis imaging: matching clinical and imaging data; J Radiol., 87 (2006), pp. 1756-1764 Y.D. Redfors,H.G. Gröndahl,J. Hellgren,N. Lindfors,I. Nilsson,C. Möller, Otosclerosis: anatomy and pathology in the temporal bone assessed by multi-slice and cone-beam CT; Otol...